Psychological tests of intelligence and of engineering ability were applied to 10 students. Here is a record of ungrouped date showing intelligence ratio (I.R.) and engineering ratio (E.R.). Calculate the coefficient of correlation Student: A B C D E F G H I J IR 105 104 102 101 100 99 98 96 93 92 FR 101 103 100 98 95 96 104 92 97 94
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Psychological tests of intelligence and of engineering ability were applied to 10 students. Here is a record of ungrouped date showing intelligence ratio (I.R.) and engineering ratio (E.R.). Calculate the coefficient of
| Student: | A | B | C | D | E | F | G | H | I | J |
| IR | 105 | 104 | 102 | 101 | 100 | 99 | 98 | 96 | 93 | 92 |
| FR | 101 | 103 | 100 | 98 | 95 | 96 | 104 | 92 | 97 | 94 |
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